"martin" wrote in message
...
On Sun, 30 Nov 2003 15:58:18 +0000, Kay Easton
wrote:


But a hedge is fairly rubbish at cutting out noise. Though you'll need a
very tall wall to cut out the traffic sound. A bank with a hedge on top
might do quite well if you have the room - no experience of that, but
it's what they seem to be doing alongside new bypasses nowadays.

It doesn't mean that it is effective.

The Dutch installed hundreds of kilometers of sound barriers along
urban parts of their motorways, before somebody made some independent
sound measurements and proved that the stuff was not effective.

Locally somebody did some tests that demonstrated that in a gale the
whole lot my blow over, so they made lots of really big holes in it.

To provide a good path to let the sound get back to the side from which it
came?

Franz